python - 在 QLCDNumber 小部件上显示数字

Question

我对 Qt 和 python 有点陌生。我创建了一个简单的 GUI，它由垂直 slider 和一个 QLCDNumber 小部件组成。我以某种方式使用函数访问了 slider 的值。但现在我想在 QLCDNumber 显示中显示新生成的值。我该怎么做？有什么方法可以在 QLCDNumber 显示中显示新值 (ipp)？我的代码如下:

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(733, 498)
        self.centralWidget = QtGui.QWidget(MainWindow)
        self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
        self.verticalSlider = QtGui.QSlider(self.centralWidget)
        self.verticalSlider.setGeometry(QtCore.QRect(110, 80, 20, 331))
        self.verticalSlider.setOrientation(QtCore.Qt.Vertical)
        self.verticalSlider.setObjectName(_fromUtf8("verticalSlider"))
        self.lcdNumber = QtGui.QLCDNumber(self.centralWidget)
        self.lcdNumber.setGeometry(QtCore.QRect(320, 180, 191, 81))
        self.lcdNumber.setObjectName(_fromUtf8("lcdNumber"))
        MainWindow.setCentralWidget(self.centralWidget)
        self.menuBar = QtGui.QMenuBar(MainWindow)
        self.menuBar.setGeometry(QtCore.QRect(0, 0, 733, 21))
        self.menuBar.setObjectName(_fromUtf8("menuBar"))
        MainWindow.setMenuBar(self.menuBar)
        self.mainToolBar = QtGui.QToolBar(MainWindow)
        self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
        MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
        self.statusBar = QtGui.QStatusBar(MainWindow)
        self.statusBar.setObjectName(_fromUtf8("statusBar"))
        MainWindow.setStatusBar(self.statusBar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
        QtCore.QObject.connect(self.verticalSlider, QtCore.SIGNAL(_fromUtf8("valueChanged(int)")), self.abc)


    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))

    def abc(self, ip):
        self.ipp = ip - 10

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Answer 1

你需要添加一个简单的函数

def abc(self, ip):
        self.ipp = ip - 10
        self.lcdNumber.display(self.ipp)

这将显示您新生成的值